merge: CI/CD improvements and Image Updater fixes from fix/unified-ci

- Upgrade pnpm to v12.3.4 for reproducible builds
- Skip build scripts during pnpm install
- Enable ArgoCD Image Updater annotations
- Add images section to kustomization for Image Updater
- Remove sops field to unblock vanilla kustomize parsing

Closes PR #4

infra/portfolio/base/deployment.yaml

@@ -6,6 +6,9 @@ metadata:
   labels:
     app.kubernetes.io/name: portfolio
     app.kubernetes.io/component: web
+  annotations:
+    argocd-image-updater.argoproj.io/image-list: portfolio=forgejo.riotpiao.com/rock/portfolio
+    argocd-image-updater.argoproj.io/portfolio.update-strategy: latest
 spec:
   replicas: 2
   selector:

infra/portfolio/base/kustomization.yaml

@@ -8,6 +8,10 @@ resources:
 - service.yaml
 - ingress.yaml
 
-# Decrypt secrets via SOPS before applying
-sops:
-  version: 3
+# ArgoCD Image Updater configuration - for tag updates
+images:
+- name: forgejo.riotpiao.com/rock/portfolio
+  newTag: latest
+
+# Note: SOPS decryption is handled by ArgoCD repo-server plugin,
+# not via kustomization.yaml, to allow Image Updater to parse this file